[SpEEdyBL]

The 380c 9t on 3s lipo will reach 50 mph in a t4, just like your 6s on 2s lipo, but it will spool up much much faster. The only downside is that it's picky with the gearing. Even faster is the lehner 4200, which is just as light as the 380c 9t, but costs twice as much. These motors are good if you are extremely impatient. I highly recommend that you wait for the mamba motors. That's what we've all all been waiting for for the past 2 years. The release date is suposed to be in 2 days.